This sensor detects changes in
infrared radiation which occur when there is movement by a person (or object)
which is different in temperature from the surroundings. As this sensor detects
temperature differences, it is well suited to detecting the motion of people by
their body temperature. The sensor is also characterized by a narrow sensing
area.

The 8/8/8 is a USB-based interface board that features 8 analog inputs,
8 digital inputs, and 8 digital outputs. You can use the 8/8/8 to
monitor sensors, receive input from switches, control lights, trigger
external circuits, and much more; all through one USB port!